#学习面向对象术语，又名oop_test.py,PHRASES短语，ANSWER解答
import random
from urllib.request import urlopen
import sys

WORD_URL="http://learncodethehardway.org/words.txt"
WORDS=[]

PHRASES={
   "class %%%(%%%):":
    "Make a class named %%% that is-a %%%.",
   "class %%%(object):\n\tdef __init__(self,***)":
     "class %%% has-a __init__ that takes self and *** params.",
   "class %%%(object):\n\tdef ***(self,@@@)":
     "class %%% has-a function *** that takes self and @@@ params.",
   "***=%%%()":
     "Set *** to an instance of class %%%.",
   "***.***(@@@)":
     "From *** get the *** function,call it with params self,@@@.",
   "***.***='***'":
     "From *** get the *** attribute and set it to '***'."
   }

#do they want to drill phrases fist他们想先练习短语吗
if len(sys.argv)==2 and sys.argv[1]=="english":
    PHRASE_FIRST=True
else:
    PHRASE_FIRST=False

#load up the words from the website加载网站上的文字
for word in urlopen(WORD_URL).readlines():
    WORDS.append(str(word.strip(),encoding="utf-8"))


def convert(snippet,phrase):
    class_names=[w.capitalize() for w in
                 random.sample(WORDS,snippet.count("%%%"))]
    other_names=random.sample(WORDS,snippet.count("***"))
    results=[]
    param_names=[]

    for i in range(0,snippet.count("@@@")):
        param_count=random.randint(1,3)
        param_names.append(','.join(
            random.sample(WORDS,param_count)))

    for sentence in snippet,phrase:
        result=sentence[:]

        #fake class names假名
        for word in class_names:
            result=result.replace("%%%",word,1)

        #fake other names伪造其他字
        for word in other_names:
            result=result.replace("***",word,1)

        #fake parameter lists伪造的参数表
        for word in param_names:
            result=result.replace("@@@",word,1)

        results.append(result)

    return results


# keep going until they hit CTRL_D继续走，直到他们按下 ctrl _ d
try:
    while True:
        snippets=list(PHRASES.keys())
        random.shuffle(snippets)

        for snippet in snippets:
            phrase=PHRASES[snippet]
            question,answer=convert(snippet,phrase)
            if PHRASE_FIRST:
                question,answer=conver,question

            print(question)

            input(">")
            print(f"ANSWER: {answer}\n\n")
except EOFError:
     print("\nBYE")
